: Format a USB drive to FAT32 . Copy the extracted firmware file directly to the root of the USB (not inside any folder). Flash Firmware : Turn off the TV and unplug it from power. Insert the USB drive into the TV's USB port.
Press and hold the button on the TV panel (not the remote). Download Haier LE55U6500UAG Firmware part04 rar
If you have already acquired the full set of .rar files (part01 through part04) from a third-party technician forum or collection: : Format a USB drive to FAT32